Sorry for the delay Paul, had to get the photo. See below.
Looks like paint is blank, I understand C/B got these as an incomplete chassis. Luckily, I may have decoded the C/B paint number possibly. Check out
http://www.phantomcoaches.org/literature/68dw28.jpg for the 1968 C/B color options. For all but the one I need (of course), the last number is clearly an RM-BASF color. Also, seems like the vast majority corresponded in name too for that year's Oldsmobile paint names. Check out
http://paintref.com/cgi-bin/colorcodedisplay.cgi?year=1968&manuf=GM&model=Oldsmobile for cross-comparison.
However, you'll see Bolero Red as R/L55R012/1U5742R with the middle number matching my data plate. Unfortunately that last number that is otherwise RM-BASF doesn't come up when I search it and is the only one different from the others with the last number not corresponding at all it seems. Further, there is Scarlet too - which was the Oldsmobile red (paint code R) for that year.
Interestingly, Bolero Red (GM code WA3595) was never an Oldsmobile color name, that was the name for Chevrolet's red with the same color called Spanish Red on Oldsmobile. The WA3595 GM code only existed for that year - 1967. Regardless of name difference, both had paint code R and were the standard red for that year. R for 1968 was the darker red paint - named Scarlet for Oldsmobile and Matador Red for Chevrolet with GM Code WA3804. After 1968, the letter codes go away and become a less useful 2-digit code. So, the only real conclusion I can make I am coming to is that for 1968 C/B had a special red option which referred to the previous year's lighter red. Fascinating.
The question is what happened by 1970. I imagine it wouldn't make sense to have that internal L55R012 paint number become something else by then. I can't link it up to any specific reason why they'd do this that would allow me to infer why they would carry over that color. There were no lighter red options offered in 1968-1970 as standard - just one red outside of the Corvette reds. Nope, it wasn't a special Corvette color, by the way. I wondered if that might be something to do with it, but again it was just the standard red for the year previous to the 1968 options listed. Perhaps someone at C-B just liked the color. Either which way, the most likely conclusion I can think of based on given information is the red paint on my ambulance was originally 1967 Bolero/Spanish Red. The white on top is probably the 1970 white for Oldsmobile, Porcelain White (WA 3465).
What do you all think? The above was rather painful to come up with...